Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r788c0f92052a7d8f0d67dd4ab607b48520013589 -r261cfc6d93996e76e26c1e9c3f5740077ad2ec22
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 788c0f92052a7d8f0d67dd4ab607b48520013589)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 261cfc6d93996e76e26c1e9c3f5740077ad2ec22)
@@ -7,8 +7,8 @@
 *
 * @file    Heaters.c
 *
-* @author  (last)      Dara Navaei
-* @date    (last)      04-Aug-2022
+* @author  (last)      Bill Bracken
+* @date    (last)      22-Aug-2022
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  23-Apr-2020
@@ -68,6 +68,7 @@
 #define DELTA_TEMPERATURE_TIME_COSNTANT_C                          8.6F                                                            ///< Delta temperature calculated from time constant.
 #define PRIMARY_HEATER_DUTY_CYCLE_PER_TEMPERATURE_C                0.015F                                                          ///< Primary heaters duty cycle per temperature in C.
 #define DATA_PUBLISH_COUNTER_START_COUNT                           70                                                              ///< Data publish counter start count.
+#define MIN_RO_HEATER_FLOWRATE_LPM                                 0.2F                                                            ///< Minimum target RO heater flow rate in L/min.
 
 static const F32 WATER_SPECIFIC_HEAT_DIVIDED_BY_MINUTES = 4184 / SEC_PER_MIN;                                                      ///< Water specific heat in J/KgC / 60.
 static const F32 PRIMARY_HEATERS_MAXIMUM_POWER_WATTS    = 475 + 237.5F;                                                            ///< Primary heaters maximum power (main primary = 475W and small primary = 237.5W).